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Updated: Aug 14, 2026

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
Published on: July 18, 2014
A new method for obtaining adsorption isotherms on colloidal suspensions via electrokinetic sonic amplitude
Kleber L Guimarães1, Ricardo H R Castro, Douglas Gouvêa
1Department of Metallurgical and Materials Engineering, Escola Politécnica, Universidade de São Paulo, Brazil.
Abstract:
The standard methods for obtaining adsorption isotherms on colloidal suspensions are usually very time consuming and involve a large number of steps and assumptions that increase the experimental errors. In this work, an alternative method is proposed to evaluate the adsorption behavior of electrosteric-stabilized systems based on electrokinetic sonic amplitude signal measurements. The new method, entitled "zeta-sorption", is noticeably less time-consuming when compared to conventional procedures but showed great precision and reliability confirmed by comparison with data obtained from conventional routes on alumina-polyacrylate and alumina-citric acid aqueous suspensions. The experimental conditions that restrict the applicability of the new method were identified and justified by discussing the possible ion exchanges.
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